"Number of crashes" is not as important as "crashes weighted by severity". "Distracted driver" is the number 1 root cause of accidents, and "failure to stay in

"Number of crashes" is not as important as "crashes weighted by severity". "Distracted driver" is the number 1 root cause of accidents, and "failure to stay in lane" is the number 1 proximate cause of fatal accidents in most states. http://www.businessinsider.com/the-cause-of-the-most-fatal-car-crashes-2015-5 http://www.businessinsider.com/the-cause-of-the-most-fatal-c...